Sami Ullah

3.4k total citations · 1 hit paper
93 papers, 2.2k citations indexed

About

Sami Ullah is a scholar working on Environmental Chemistry, Ecology and Soil Science. According to data from OpenAlex, Sami Ullah has authored 93 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Environmental Chemistry, 36 papers in Ecology and 25 papers in Soil Science. Recurrent topics in Sami Ullah's work include Soil and Water Nutrient Dynamics (37 papers), Peatlands and Wetlands Ecology (29 papers) and Soil Carbon and Nitrogen Dynamics (24 papers). Sami Ullah is often cited by papers focused on Soil and Water Nutrient Dynamics (37 papers), Peatlands and Wetlands Ecology (29 papers) and Soil Carbon and Nitrogen Dynamics (24 papers). Sami Ullah collaborates with scholars based in United Kingdom, United States and Canada. Sami Ullah's co-authors include Tim R. Moore, Fotis Sgouridis, Iseult Lynch, Zhiling Guo, Peng Zhang, Stefan Krause, Stephen P. Faulkner, Antreas Afantitis, Georgia Melagraki and Sophie Comer‐Warner and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Nature Communications and SHILAP Revista de lepidopterología.

In The Last Decade

Sami Ullah

86 papers receiving 2.1k citations

Hit Papers

Nanotechnology and artificial intelligence to enable sust... 2021 2026 2022 2024 2021 50 100 150 200 250
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Nanotechnology and artificial intelligence to enable sustainable and precision agriculture
    2021 256 citations Sami Ullah, Iseult Lynch et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Sami Ullah United Kingdom 25 664 627 545 390 321 93 2.2k
Junjian Wang China 36 827 1.2× 469 0.7× 771 1.4× 572 1.5× 523 1.6× 153 3.6k
Yanjiang Cai China 35 787 1.2× 543 0.9× 1.6k 2.9× 313 0.8× 572 1.8× 138 3.4k
Amnat Chidthaisong Thailand 32 786 1.2× 686 1.1× 616 1.1× 701 1.8× 453 1.4× 82 2.8k
B. Jack Cosby United States 9 705 1.1× 923 1.5× 600 1.1× 418 1.1× 343 1.1× 15 2.5k
Shigeto Sudo Japan 25 434 0.7× 484 0.8× 1.1k 2.0× 417 1.1× 468 1.5× 68 2.0k
Zhong‐Liang Wang China 24 600 0.9× 274 0.4× 563 1.0× 421 1.1× 187 0.6× 56 2.0k
Cheng Liu China 34 717 1.1× 932 1.5× 254 0.5× 249 0.6× 437 1.4× 150 3.0k
Xueping Chen China 29 907 1.4× 653 1.0× 393 0.7× 171 0.4× 526 1.6× 145 2.9k
Bernd Lennartz Germany 36 1.1k 1.6× 807 1.3× 754 1.4× 411 1.1× 482 1.5× 148 3.7k

Countries citing papers authored by Sami Ullah

Since Specialization
Citations

This map shows the geographic impact of Sami Ullah's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Sami Ullah with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Sami Ullah more than expected).

Fields of papers citing papers by Sami Ullah

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sami Ullah. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Sami Ullah. The network helps show where Sami Ullah may publish in the future.

Co-authorship network of co-authors of Sami Ullah

This figure shows the co-authorship network connecting the top 25 collaborators of Sami Ullah. A scholar is included among the top collaborators of Sami Ullah based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Sami Ullah. Sami Ullah is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Guo, Yafei, et al.. (2025). A new fibre microfluidic soil pore water sampling device for NH4+-N sensing using ion-selective electrode sensors (ISEs). SHILAP Revista de lepidopterología. 3(2). 100142–100142.
2.
Foyer, Christine H., Scott A. L. Hayward, Rosa Sánchez‐Lucas, et al.. (2025). Responses of an Old Deciduous Forest Ecosystem to Elevated CO2. Global Change Biology. 31(7). e70355–e70355. 2 indexed citations
3.
Hayward, Scott A. L., Shengwei Liu, Yin Chen, et al.. (2025). Absence of Wolbachia in the sub-Antarctic midge, Eretmoptera murphyi (Diptera: Chironomidae). Antarctic Science. 37(4). 332–337.
4.
Limpens, Juul, Claire M. Belcher, Richard C. Chiverrell, et al.. (2025). Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire. University of Birmingham Research Portal (University of Birmingham). 1(1). 11001–11001.
5.
Pihlblad, Johanna, et al.. (2025). Rapid Increase in Soil Respiration and Reduction in Soil Nitrate Availability Following CO2 Enrichment in a Mature Oak Forest. ACS Omega. 10(1). 1624–1634. 1 indexed citations
6.
Pihlblad, Johanna, Fotis Sgouridis, Michaela K. Reay, et al.. (2025). Root exudate stoichiometry is a key driver of soil N cycling: implications for forest responses to global change. Soil Biology and Biochemistry. 208. 109856–109856. 2 indexed citations
7.
Ullah, Sami, et al.. (2024). CHALLENGES AND OPPORTUNITIES TO DESIGN FUTURE CROPS: GATEWAY TO SUSTAINABLE AGRICULTURE IN 21ST CENTURY. Biological and Clinical Sciences Research Journal. 2024(1). 847–847. 1 indexed citations
8.
Limpens, Juul, João Pedro Nunes, Kieran Khamis, et al.. (2024). Enhanced Hydrologic Connectivity and Solute Dynamics Following Wildfire and Drought in a Contaminated Temperate Peatland Catchment. Water Resources Research. 60(7). 4 indexed citations
9.
Sgouridis, Fotis, et al.. (2024). The role of rhizosphere in enhancing N availability in a mature temperate forest under elevated CO2. Soil Biology and Biochemistry. 197. 109537–109537. 8 indexed citations
10.
Lewicka‐Szczebak, Dominika, Fotis Sgouridis, Reinhard Well, et al.. (2024). Combining the 15 N Gas Flux Method and N 2 O Isotopocule Data for the Determination of Soil Microbial N 2 O Sources. Rapid Communications in Mass Spectrometry. 39(6). e9971–e9971.
11.
Barba, Josep, Kris M. Hart, A. R. MacKenzie, et al.. (2024). Fertilization-induced greenhouse gas emissions partially offset carbon sequestration during afforestation. Soil Biology and Biochemistry. 199. 109577–109577. 3 indexed citations
12.
Krause, Stefan, Richard J. Norby, Dang Thuong Huyen, et al.. (2023). Global mangrove root production, its controls and roles in the blue carbon budget of mangroves. Global Change Biology. 29(12). 3256–3270. 47 indexed citations
13.
Wendt, Doris E., Giulio Curioni, A. R. MacKenzie, et al.. (2023). Soil moisture and temperature dynamics in juvenile and mature forest as a result of tree growth, hydrometeorological forcings, and drought. Hydrological Processes. 37(6). 5 indexed citations
14.
Sgouridis, Fotis, et al.. (2023). Stimulation of soil gross nitrogen transformations and nitrous oxide emission under Free air CO2 enrichment in a mature temperate oak forest at BIFoR-FACE. Soil Biology and Biochemistry. 184. 109072–109072. 11 indexed citations
15.
16.
Sgouridis, Fotis, et al.. (2021). Chronic Atmospheric Reactive Nitrogen Deposition Suppresses Biological Nitrogen Fixation in Peatlands. Environmental Science & Technology. 55(2). 1310–1318. 20 indexed citations
17.
MacKenzie, A. R., Stefan Krause, Kris M. Hart, et al.. (2021). BIFoR FACE: Water–soil–vegetation–atmosphere data from a temperate deciduous forest catchment, including under elevated CO2. Hydrological Processes. 35(3). 14 indexed citations
18.
Sgouridis, Fotis, et al.. (2019). Biological nitrogen fixation in peatlands: Comparison between acetylene reduction assay and 15N2 assimilation methods. Soil Biology and Biochemistry. 131. 157–165. 42 indexed citations
19.
Sgouridis, Fotis & Sami Ullah. (2017). Soil Greenhouse Gas Fluxes, Environmental Controls, and the Partitioning of N2O Sources in UK Natural and Seminatural Land Use Types. Journal of Geophysical Research Biogeosciences. 122(10). 2617–2633. 23 indexed citations
20.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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